闡述保(bao)護用電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)互感器（TA）主要與繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)保(bao)護裝置配(pei)合使(shi)(shi)用。如果發(fa)生短(duan)路(lu)或線路(lu)過載，它會向繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)器設備發(fa)出信(xin)號(hao)，以(yi)(yi)切斷故(gu)障(zhang)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)，以(yi)(yi)保(bao)護電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)系(xi)統的安全。工(gong)作(zuo)(zuo)條件與換能器根本不同(tong)。傳感器的正常(chang)初級(ji)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)工(gong)作(zuo)(zuo)范圍相(xiang)當準確。如果故(gu)障(zhang)短(duan)路(lu)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)通過，則(ze)變(bian)壓器應盡快(kuai)飽和(he)(he)，以(yi)(yi)保(bao)護儀表(biao)不受(shou)短(duan)路(lu)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)的損害(hai)。前(qian)者僅(jin)在電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)大于正常(chang)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)幾倍或十倍并且其誤(wu)差(cha)(cha)(cha)（電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)和(he)(he)相(xiang)位誤(wu)差(cha)(cha)(cha)）必須在誤(wu)差(cha)(cha)(cha)曲線范圍內時才開始工(gong)作(zuo)(zuo)。當同(tong)時評估電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)誤(wu)差(cha)(cha)(cha)和(he)(he)相(xiang)位差(cha)(cha)(cha)時，將使(shi)(shi)用復合誤(wu)差(cha)(cha)(cha)。

高壓柜的保護模式包括通過保險絲或繼電器保護（動作）關閉或報警電氣開關。如果保險絲燒斷，則斷路器跳閘的保護方法是機械跳閘保護。繼電保護是一種由各種繼電器組成的保護電路，當使用信號繼電器發出信號（或聲光信號）以完成警報時，會使繼電器跳閘。斷路器本身沒有保護功能，只能起到中斷電流和電弧的作用。高壓柜主要由斷路器，保護裝置和電路組成。高壓柜的保護由保護繼電器完成（常規保護方法或綜合保護方法）。生產(chan)廠家一開始的(de)保護(hu)(hu)是(shi)多個繼(ji)電器具有不同的(de)功(gong)能。然后，不同的(de)繼(ji)電器在電路中發(fa)揮(hui)各自的(de)保護(hu)(hu)功(gong)能。

負(fu)荷開(kai)關(guan)：負(fu)荷開(kai)關(guan)具有簡(jian)(jian)單(dan)(dan)(dan)的(de)滅(mie)(mie)弧(hu)裝(zhuang)置。滅(mie)(mie)弧(hu)介質通(tong)(tong)常(chang)是(shi)空氣，它(ta)(ta)可(ke)以(yi)產生(sheng)并中斷(duan)(duan)(duan)某些電(dian)流和(he)過電(dian)流，但不能中斷(duan)(duan)(duan)短路電(dian)流，也不能用(yong)于(yu)消除短路故障。因此(ci)，不允許(xu)簡(jian)(jian)單(dan)(dan)(dan)地使用(yong)負(fu)載(zai)開(kai)關(guan)來替代斷(duan)(duan)(duan)路器。如果(guo)要使用(yong)斷(duan)(duan)(duan)路器，則必須將它(ta)(ta)們與上述(shu)高壓熔斷(duan)(duan)(duan)器結合使用(yong)（實際上，斷(duan)(duan)(duan)路器和(he)斷(duan)(duan)(duan)路器通(tong)(tong)常(chang)串(chuan)聯使用(yong)，以(yi)提(ti)供簡(jian)(jian)單(dan)(dan)(dan)的(de)過載(zai)保護。以(yi)降(jiang)低(di)項(xiang)目成本）。負(fu)載(zai)開(kai)關(guan)類(lei)似于(yu)隔離刀，并且(qie)有明(ming)顯的(de)隔離間隙，很容易判斷(duan)(duan)(duan)電(dian)路是(shi)打開(kai)還(huan)是(shi)關(guan)閉。